diff --git a/AutoDL/autodl_scheduling/entity/instance_pool.py b/AutoDL/autodl_scheduling/entity/instance_pool.py
index ff8c1d3..947a1b6 100644
--- a/AutoDL/autodl_scheduling/entity/instance_pool.py
+++ b/AutoDL/autodl_scheduling/entity/instance_pool.py
@@ -33,15 +33,16 @@ class InstancePool:
         self.instances:List[Instance] = []
         self.executor = ThreadPoolExecutor(max_workers=os.cpu_count()*2)
         self.threads = []
+        self.intro_threads = []
 
-    def scale_instance(self, target_instance):
+    def scale_instance(self, target_instance, disable_shrink=True):
         if target_instance + self.buffer_instance < self.min_instance:
             return self._scale(self.min_instance)
         if target_instance + self.buffer_instance > self.max_instance:
             return self._scale(self.max_instance)
         if target_instance + self.buffer_instance == len(self.instances):
             return True
-        return self._scale(target_instance + self.buffer_instance)
+        return self._scale(target_instance + self.buffer_instance, disable_shrink)
 
     def remove_instance(self, instance:Instance):
         if instance_operate(instance.uuid, "power_off"):
@@ -73,21 +74,34 @@ class InstancePool:
 
     def introspection(self):
         # 停止超时实例(运行超时和无任务超时)
+        before=len(self.instances)
         instance_copy = copy.deepcopy(self.instances)
+        flag = False
         for instance in instance_copy:
             if instance.active:
                 if (time.time() - instance.last_active_time) > self.timeout:
-                    self.threads.append(self.executor.submit(self.remove_instance, instance=instance))
+                    flag = True
+                    self.intro_threads.append(self.executor.submit(self.remove_instance, instance=instance))
             else:
                 if (time.time() - instance.last_active_time) > self.scaledown_window:
-                    self.threads.append(self.executor.submit(self.remove_instance, instance=instance))
+                    flag = True
+                    self.intro_threads.append(self.executor.submit(self.remove_instance, instance=instance))
+        while len(self.intro_threads) > 0:
+            for t in self.intro_threads:
+                t.result(timeout=self.timeout//2)
+                self.intro_threads.remove(t)
+        after = len(self.instances)
+        if flag:
+            loguru.logger.info("Instance Num Before Introspecting %d After Introspecting %d" % (before, after))
 
-    def _scale(self, target_instance:int):
-        loguru.logger.info("Instance Num Before Scaling %d ; Target %d" % (len(self.instances), target_instance))
+    def _scale(self, target_instance:int, disable_shrink=True):
         self.introspection()
         # 调整实例数量
         instance_copy = copy.deepcopy(self.instances)
         dest = target_instance - len(instance_copy)
+        if (disable_shrink and dest < 0) or dest == 0:
+            return True
+        loguru.logger.info("Instance Num Before Scaling %d ; Target %d" % (len(self.instances), target_instance))
         if dest < 0:
             dest = abs(dest)
             for instance in instance_copy:
diff --git a/AutoDL/autodl_scheduling/entity/running_pool.py b/AutoDL/autodl_scheduling/entity/running_pool.py
index 5bc8927..36aa859 100644
--- a/AutoDL/autodl_scheduling/entity/running_pool.py
+++ b/AutoDL/autodl_scheduling/entity/running_pool.py
@@ -1,4 +1,5 @@
 import time
+import traceback
 import uuid
 from concurrent.futures.thread import ThreadPoolExecutor
 from typing import Union
@@ -18,6 +19,8 @@ class RunningPool:
     def run(self, instance_id, uid, base_url:str, video_file:Union[UploadFile,str], audio_file:Union[UploadFile,str]) -> Union[bool, None]:
         try:
             code = self._req(base_url, video_file, audio_file)
+            if not code:
+                raise Exception("[Code] is None")
         except Exception as e:
             loguru.logger.error("%s Task Submit Failed: %s" % (uid, e))
             return None
@@ -41,6 +44,7 @@ class RunningPool:
                         return {"status": resp.json()['status'], "msg": resp.json()['msg'],
                                     "instance_id": self.tasks[uid]["instance_id"]}
             except Exception as e:
+                traceback.print_exc()
                 loguru.logger.error("%s Get Result Failed: %s" % (uid, e))
                 return None
         else:
diff --git a/AutoDL/autodl_scheduling/server.py b/AutoDL/autodl_scheduling/server.py
index 8e108f2..1d79ccf 100644
--- a/AutoDL/autodl_scheduling/server.py
+++ b/AutoDL/autodl_scheduling/server.py
@@ -53,20 +53,17 @@ class Server:
             return {"status": "queuing", "msg":""}
 
     def introspect_instance(self):
-        loguru.logger.info("Introspecting worker started")
+        loguru.logger.info("Introspecting worker started || Scaledown Window: %ds" % self.instance_pool.scaledown_window)
         while True:
             self.instance_pool.introspection()
-            time.sleep(0.5)
+            time.sleep(1)
 
     def scaling_worker(self):
         loguru.logger.info("Scaling worker started")
         try:
-            last_target = 0
             while True:
                 # 提交任务
-                if last_target != self.waiting_queue.get_size()+self.running_pool.get_running_size():
-                    last_target = self.waiting_queue.get_size()+self.running_pool.get_running_size()
-                    self.instance_pool.scale_instance(last_target)
+                self.instance_pool.scale_instance(self.waiting_queue.get_size()+self.running_pool.get_running_size(), disable_shrink=True)
                 for instance in self.instance_pool.instances:
                     if not instance.active:
                         # 从等待队列取出任务